S-90337A458 1/4"-20 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 Stainless Steel construction and passivated finish, ideal for harsh industrial environments.
- Precise component alignment thanks to the 1/2" shoulder with tight diameter and length tolerances, reducing assembly errors.
- High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load.
- Easy installation and removal with a 5/32" hex drive and low-profile socket head, saving time during maintenance.
- Secure thread engagement with Class 2A UNC coarse threads, ensuring consistent fastening in right-hand applications.
- Compliance with global standards including RoHS 3 and REACH, making it suitable for regulated industries.
- Durable surface protection from the passivated finish, extending service life by resisting oxidation and wear.
Professional Applications & Engineering Value
This 18-8 Stainless Steel Shoulder Screw is engineered to address critical alignment and durability challenges in precision machinery. The 1/4"-20 UNC thread with coarse spacing provides quick assembly in industrial applications like robotics, conveyor systems, and automated equipment, where Class 2A thread fit ensures reliable torque transmission. The precise shoulder diameter and length minimize play, enabling accurate positioning of moving parts. Made from corrosion-resistant stainless steel with a passivated finish, it withstands exposure to moisture and chemicals, reducing maintenance downtime. Its 70,000 psi tensile strength and low-profile socket head make it a robust choice for high-stress environments, enhancing operational efficiency and longevity.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder features tight tolerances: diameter from -0.001" to 0" and length from 0" to 0.002". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.
